vs
QUICK ANSWER
"Sueldo" is a noun which is often translated as "salary", and "salario" is a noun which is also often translated as "salary". Learn more about the difference between "sueldo" and "salario" below.
el sueldo()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
el salario()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).